List of array object iteration in java 8 - sql

Question

I am setting the type for sql query result set as List in java. I am trying to convert it into
a dto.
When I see the List<Object[]> structure from query. It shows
resultList-ArrayList<E>
[0....9999]
[0..99]
[0]=Object[3]
[0]="jjj"
[1]="8787"
[2]="7686"
So is this expected. How can I access the object values here(jjj,8787...) by setting it to dto.
I tried something like this
List<Dto> dtoList = resultList.stream().map(obj->{
Dto dt = new Dto()
dt.setName(obj[0]);
).collect(Collectors.toList())
This is not correct as I am not able to access the object
Should I do another level of iteration in order to reach that object or is my generic type for result set is right
Thanks

Answer 1

Try this:
Object[] inner = new Object[]{"jjj", "8787", "7686"};
Object[] outer = new Object[]{inner};
List<Object[]> resultList = new ArrayList<>();
resultList.add(outer);
List<Dto> dtos;
dtos = resultList.stream()
.flatMap((Object[] objArr) -> {
Object[] subArr = (Object[]) objArr[0];
return Arrays.asList(subArr).stream()
.map(obj -> obj.toString());
})
.map(name -> {
Dto dto = new Dto();
dto.setName(name);
return dto;
})
.collect(Collectors.toList());